JP2001316533A - Nonhalogenated flame-retardant resin composition and molded product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a flame-retardant resin composition having flame retardancy equivalent to polyvinyl chloride(PVC), allowing incinerating disposal and good in mechanical properties. SOLUTION: This nonhalogenated flame-retardant resin composition is obtained by adding a metal hydroxide in an amount of 50-300 pts.wt. and a zinc compound in an amount of 1-50 pts.wt. based on 100 pts.wt. of a base resin prepared by mixing 30-65 pts.wt. of A component selected from the group consisting of polyolefin-based resins containing oxygen atom in the polymer, 15-70 pts.wt. of B component selected from the group consisting of acryl rubber, ethylene-acryl rubber and urethane rubber and 0-15 pts.wt. of C component selected from the group consisting of acid-modified polyolefin-based resins so that the total amount of each component is 100 pts. wt.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flame-retardant resin composition having the same flame retardancy as a polyvinyl chloride (PVC) composition and containing no halogen and capable of being incinerated.

[0002]

2. Description of the Related Art PVC compositions are widely used in wire coatings, tubes, tapes, packaging materials, building materials, etc. because of their good electrical insulation and self-extinguishing flame retardancy. By the way, since the PVC composition contains chlorine (Cl) which is a halogen, there is a possibility that a corrosive gas such as HCl or a toxic gas such as dioxin is generated during combustion. For this reason, when various PVC products become waste, it is difficult to incinerate them. At present, however, landfills are used, but Pb-based stabilizers are often used as additives in PVC compositions. It's getting harder.

[0003]

On the other hand, PVC
If a halogen-free polyethylene (PE) or polypropylene (PP) is used as a resin composition instead of
Since no harmful gas is generated during combustion, incineration is possible. However, these halogen-free resin compositions are made of PVC.
There was a defect that the flame retardancy was inferior to that of For example, when comparing the oxygen index (OI) which is one of the evaluation scales of the flame retardancy of the resin composition, the OI of PVC is 23 to 40, whereas the OI of PE and PP is about 17 to 19. It turns out that it is inferior. Therefore, in order to impart flame retardancy to a halogen-free resin composition such as PE or PP, it is usually practiced to add a metal hydroxide such as Mg (OH) ₂ or Al (OH) ₃ thereto. Have been done. However, in some cases, the desired high flame retardancy cannot be obtained by using only metal hydroxide, or when a large amount of metal hydroxide is added to obtain the desired high flame retardancy, characteristics such as mechanical properties are significantly deteriorated. is there.

[0004] The present invention has been made in view of the above circumstances, and provides a flame-retardant resin composition which has the same flame retardancy as PVC, can be incinerated, and has good mechanical properties. Aim.

[0005]

In order to solve the above-mentioned problems, a non-halogen flame-retardant resin composition according to the present invention comprises an A component 30 to 65 selected from the group consisting of polyolefin resins containing oxygen atoms in the polymer. Parts by weight, 15 to 70 parts by weight of a B component selected from the group consisting of acrylic rubber, ethylene-acrylic rubber, and urethane rubber, and C selected from the group consisting of acid-modified polyolefin-based resins
0 to 15 parts by weight of the components, 50 to 300 parts by weight of the metal hydroxide, and 1 to 50 parts by weight of the zinc compound with respect to 100 parts by weight of the base resin obtained by mixing the components so that the total of each component becomes 100 parts by weight. Parts are added.

The component A is one or two selected from the group consisting of ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-butyl acrylate copolymer, and ethylene-methyl acrylate copolymer. Preferably, it is at least one species. Further, it is preferable that part or all of the metal hydroxide is a metal hydroxide surface-treated with a silane coupling agent. The non-halogen flame-retardant resin composition of the present invention is suitably used for electric wires and cables or peripheral parts thereof, and is particularly suitable for electric wires for equipment or electric wires for automobiles. Further, a flame-retardant resin molded product obtained by crosslinking the halogen-free flame-retardant resin composition of the present invention after molding is also included in the scope of the present invention. The gel fraction of the crosslinked non-halogen flame-retardant resin molded product was 25%.
６０60%.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
As the base resin of the non-halogen flame-retardant resin composition of the present invention, a polyolefin-based resin containing no halogen is used. In particular, a base obtained by combining the following components A, B and C in a specific ratio. Resin is used. The component A constituting the base resin in the present invention is selected from the group consisting of polyolefin-based resins containing an oxygen atom in the polymer. However, B in the present invention described later
Components included in the component are not included in the component A in the present invention.

[0008] In the present invention, the component A may be one kind or two.
More than one species may be used in combination. As a specific example, ethylene-
Examples thereof include vinyl acetate copolymer (EVA), ethylene-ethyl acrylate copolymer (EEA), ethylene-butyl acrylate copolymer (EBA), and ethylene-methyl acrylate copolymer (EMA). These resins generate non-combustible gas such as CO and / or CO ₂ by thermal decomposition of the polymer during combustion. By using this as a component of the base resin, self-extinguishing properties are exhibited during combustion. The resulting flame-retardant resin composition is obtained. Also, because these resins are relatively inexpensive,
In the present invention, 3 out of 100 parts by weight of the base resin is used.
It is preferable that 0 parts by weight or more is the component A.

In particular, in order to effectively impart flame retardancy, the content of a vinyl acetate (VA) component is 15 to 50% by weight, and the content of an EVA and ethyl acrylate (EA) component is 10 to 30% by weight. % EEA, butyl acrylate (B
EBA having a component A) content of 10 to 30% by weight is preferred.

The B component constituting the base resin in the present invention is selected from the group consisting of acrylic rubber, ethylene-acrylic rubber, and urethane rubber, and may be used alone or in combination of two or more. Since these resins have a higher content of oxygen atoms than the above-mentioned component A, using them as a component of the base resin can greatly contribute to the improvement of flame retardancy.

The resin of component B has a high affinity for additives such as a flame retardant, and by using this as a component of the base resin, the resin composition increases as the amount of the additive increases. The deterioration of the mechanical characteristics can be suppressed. Furthermore, the resin of the component B also has the advantages of good heat resistance and oil resistance, hardly deformed by heating, and good wear resistance. In the present invention, it is preferable that at least 5 parts by weight of the 100 parts by weight of the base resin is the B component.

The C component constituting the base resin in the present invention is selected from the group consisting of acid-modified polyolefin resins, and may be used alone or in combination of two or more. Specific examples include low density polyethylene (LDPE), linear low density polyethylene (LLDPE), high density polyethylene (HDPE), EVA, EEA, EBA, EMA,
Alternatively, during or after the polymerization of the same styrene-based polyolefin thermoplastic elastomer as the D component described below, an unsaturated carboxylic acid such as maleic anhydride or acrylic acid, or a derivative thereof, is reacted to form an acid-modified resin modified. No. In particular LDPE, LLDPE, and HDP
Each acid-modified resin of E is preferable because it is relatively inexpensive.

By using these resins as constituent components of the base resin, it is possible to impart polarity to the base resin, and the compatibility of the resins can be improved, so that mechanical properties such as abrasion resistance are improved. And a high affinity for the metal hydroxide, so that deterioration of the mechanical properties of the resin composition due to an increase in the amount of the metal hydroxide added can be suppressed. However, even if the use amount of the C component is increased, the mechanical properties are saturated.
It is also possible to use a composition in which the component is not added.
It is within the range of not more than 3 parts by weight, more preferably not less than 3 parts by weight and not more than 10 parts by weight.

It is also preferable to use the following component D as a component of the base resin. It is selected from the group consisting of polyolefin thermoplastic elastomers made of polyethylene and styrene resins and containing no halogen, and may be used alone or in combination of two or more. Specific examples of the styrene-based polyolefin thermoplastic elastomer include polystyrene-poly (ethylene-butylene) -polystyrene copolymer (SEBS) and polystyrene-poly (ethylene-propylene) -polystyrene copolymer (SEPS).

The resin of component D has high mechanical strength, and by using this as a component of the base resin, it is possible to impart polarity to the base resin, and the compatibility of the resin can be improved. And contribute to improvement of mechanical properties such as wear resistance. In the present invention, D is added to the base resin.
When desired mechanical properties and the like can be obtained without including the component, the base resin may be constituted without using the D component. However, the base resin is constituted by including the D component in the base resin. The resin can be compatibilized, and high mechanical strength can be achieved.

However, if the content ratio of the D component in the base resin is large, there is a concern that the flame retardancy may decrease. Therefore, in the present invention, the mixing ratio of the D component in 100 parts by weight of the base resin is 0 to 30 parts by weight. It is preferably within the range of not more than 1 part by weight, more preferably not less than 1 part by weight and not more than 20 parts by weight.

In the present invention, the base resins A, B,
It has a composition in which the components C and C are mixed so that the total amount is 100 parts by weight. The mixing ratio of each component is A component 3
0-65 parts by weight, B-component 15-70 parts by weight, C-component 0-
It is preferably set within a range of 15 parts by weight, more preferably 40 to 65 parts by weight of the component A, and still more preferably 40 to 60 parts by weight.
Parts by weight, 35 to 50 parts by weight of component B, and 3 to 10 parts by weight of component C. In addition, D component 0 to 0
30 parts by weight may be used.

In the present invention, a metal hydroxide and a zinc compound are used as a flame retardant for imparting flame retardancy to the base resin. Metal hydroxides are decomposed into oxides and water vapor during combustion to exhibit flame retardancy, and magnesium hydroxide and aluminum hydroxide are preferably used. The temperature is lowered by decomposing into oxides and water vapor during combustion, and the supply of oxygen to the burning part is suppressed by the generated water vapor. Further, it is possible to prevent the flame from spreading to a new resin surface due to the attachment of the oxide to the burned portion.

Of the metal hydroxides, magnesium hydroxide is particularly preferred. In addition, in order to improve the affinity with the resin, prevent deterioration of the mechanical properties of the resin composition, and improve the water resistance and acid resistance, the metal hydroxide is used as a silane coupling agent, a higher fatty acid such as stearic acid, or an oxalate anion. The surface-treated material may be used. One kind of metal hydroxide may be used, or two or more kinds may be used in combination. In particular, when a metal hydroxide treated mainly with a silane coupling agent is mainly used, the bonding force between the resin and the metal hydroxide increases, and a resin composition having excellent mechanical properties such as abrasion resistance can be obtained. preferable.

The greater the amount of the metal hydroxide added, the higher the flame retardancy of the resin. However, if the amount is too large, the mechanical properties of the resin composition and the insulation resistance are significantly reduced. In the present invention, the addition amount of the metal hydroxide is preferably set within a range of 50 to 300 parts by weight, more preferably 100 to 250 parts by weight, based on 100 parts by weight of the base resin.

As the metal hydroxide, a metal hydroxide treated with molybdenum may be used in combination with another metal hydroxide, that is, a metal hydroxide not treated with molybdenum. In particular, it is preferable to use a combination of magnesium hydroxide and a metal hydroxide treated with molybdenum. When a metal hydroxide and a molybdenum-treated metal hydroxide are used in combination, molybdenum acts as a catalyst for promoting the formation of char (shell) in addition to the flame retardant effect of the metal hydroxide during combustion. Since this char acts as a heat insulating layer during combustion, higher flame retardancy is obtained.

The molybdenum-treated metal hydroxide is a composite of a molybdenum compound and a metal hydroxide. In particular, a metal hydroxide coated with a molybdenum compound is preferable because it is difficult to decompose during combustion. Examples of molybdenum compounds used for molybdenum treatment of metal hydroxide include oxides such as molybdenum trioxide, sulfides such as molybdenum disulfide, ammonium dimolybdate, calcium molybdate, zinc molybdate, potassium molybdate, and molybdenum. And molybdates such as sodium silicate. Particularly, ammonium molybdate ((NH ₄ ) ₄
Mo ₈ O ₂₆ ) is preferred.

As the molybdenum-treated metal hydroxide, for example, molybdenum-treated aluminum hydroxide or molybdenum-treated calcium carbonate is preferably used, and in particular, a composite such as one obtained by coating aluminum hydroxide with ammonium molybdate is preferably used. The molybdenum-treated metal hydroxide may be used alone or in combination of two or more.

In the present invention, the zinc compound to be added to the base resin has a thermal decomposition temperature of about 180 to 600 ° C. The zinc compound may be one that causes one-stage thermal decomposition, that is, one that has one thermal decomposition temperature, or one that has multiple stages of thermal decomposition, that is, one that has a plurality of thermal decomposition temperatures. As for a zinc compound having a plurality of thermal decomposition temperatures, those having all of the thermal decomposition temperatures falling within the above-mentioned temperature range can be used in the present invention.
Zinc compounds having a thermal decomposition temperature within the above temperature range,
The zinc compound thermally decomposes at the initial or middle temperature of the combustion of the resin composition and forms a hard shell (char) covering the surface of the burned material. By shutting off oxygen, it suppresses the spread of combustion and makes it flame retardant. It will contribute.

Specific examples of the zinc compound used in the present invention include zinc hydroxystannate (220 ° C .; thermal decomposition temperature, the same applies hereinafter), zinc stannate (600 ° C.), zinc methacrylate (200 ° C., 405 ° C.) Or 2-mercaptobenzimidazole zinc salt (240 ° C, 350 ° C,
(75 ° C., 540 ° C.) and the like used as a zinc-based antioxidant. Alternatively, it is used as a zinc-based sulfurization accelerator such as zinc dibenzylthiocarbamate, zinc diethyldithiocarbamate, zinc dibutyldithiocarbamate, zinc N-ethyl-N-phenyldithiocarbamate, zinc N-pentamethylenedithiocarbamate, and zinc dimethyldithiocarbamate. Can be used.

Among these, zinc compounds having a function as an antioxidant, in particular, not only act to thermally decompose during combustion to form char, but also trap radicals generated during combustion to decompose the resin. It is preferable because it has a suppressing effect.
These zinc compounds may be used alone or in combination of two or more. If the amount of the zinc compound is too large, deterioration of mechanical properties becomes large. Therefore, it is preferable to set the amount within a range of 1 to 50 parts by weight, more preferably 2 to 20 parts by weight, based on 100 parts by weight of the base resin. Parts by weight.

A molybdenum compound, a boric acid compound, a silicone compound, calcium carbonate, carbon, or the like may be added as a flame retardant aid that contributes to the improvement of flame retardancy. Examples of the molybdenum compound include oxides such as molybdenum trioxide, sulfides such as molybdenum disulfide, molybdates such as ammonium dimolybdate, calcium molybdate, zinc molybdate, potassium molybdate, and sodium molybdate. In particular, ammonium molybdate ((NH ₄ ) ₄ Mo ₈ O ₂₆ ) is preferable.

Examples of the boric acid compound include zinc borate and calcium borate. Specific examples of the silicone compound include dimethyl silicone, methyl phenyl silicone, methyl vinyl silicone and the like. Examples of the form include silicone powder, gum silicone oil, silicone oil other than gum silicone oil, and silicone modified resin. There is. Here, the gum-like silicone oil refers to a silicone oil having a large average molecular weight of about 300,000 to 1,000,000 and a relatively high viscosity at room temperature. Further, those obtained by subjecting an inorganic compound such as calcium carbonate or silica to a surface treatment with silicone powder, gum-like silicone oil, or another silicone oil can also be used.

The addition of these other flame-retardant aids is optional. When they are added, one of them may be used alone, or a plurality of them may be used in combination. Also, if the addition amount of these flame retardant auxiliary agents is too large, the deterioration of mechanical properties becomes large,
It is preferably 1 in total with respect to 100 parts by weight of the base resin.
It is set in the range of 50 parts by weight, more preferably 2 好 ま し く 10 parts by weight.

In addition, it is preferable to add an anti-aging agent, which suppresses thermal deterioration. The antioxidant is not particularly limited, but a phenol-based or amine-based agent can be preferably used. If the amount of the antioxidant is too small, the effect of addition is not obtained, and if it is too large, blooming or bleed out may occur. Therefore, 0.1 to 5.0 parts by weight based on 100 parts by weight of the base resin. Is set in consideration of the compatibility with the base resin to be used within the range of not more than 1 part.

Further, if necessary, it is preferable to add a dispersion improver having an effect of improving the dispersibility of the additive and increasing the internal lubricity. As such a dispersion improver, for example, a lubricant such as stearic acid, a metal salt of stearic acid, or a fatty acid amide, or an alkyl ether-maleic anhydride copolymer is preferably used. In particular, a nonionic maleic anhydride-modified resin is preferable because of its good bonding strength and dispersibility with an inorganic filler such as a flame retardant.

In addition, when used for electrical insulation, hydrophilic resins such as ethylene oxide type may lower insulation resistance. Therefore, lipophilic maleic anhydride-modified resins such as propion oxide type are preferred. .
These dispersion improvers may be used alone or in combination of two or more. The addition of a dispersion enhancer is optional, but the amount of addition of the dispersion enhancer is too large, the characteristics are saturated,
Since the material cost only increases, the amount is preferably set in the range of 0.1 to 10 parts by weight, more preferably 1 to 5 parts by weight, based on 100 parts by weight of the base resin.

In addition to the above-mentioned respective compounding agents, there are also various uses such as a cross-linking agent, a cross-linking assistant, an ultraviolet absorber, a copper damage inhibitor, a pigment, a dye and other coloring agents, and a small amount of inorganic fine powder such as talc. Appropriate additives can be added accordingly. Additives that do not contain halogen are selected. In addition, lead (P
It is preferable that the composition does not contain harmful heavy metals such as b) and cadmium (Cd) as much as possible, and the content of harmful heavy metals in the non-halogen flame-retardant resin composition of the present invention is 0.1%.
It is preferred to keep it below 10% by weight.

Since the non-halogen flame-retardant resin of the present invention uses rubber as a constituent component of the base resin, it is necessary to crosslink at least the rubber component after molding, and it is preferable to crosslink other resins. . Therefore, in the flame-retardant resin composition of the present invention, the heat resistance is further improved and the abrasion resistance is further improved by bonding the resins by crosslinking. As a cross-linking method, a chemical cross-linking method in which a cross-linking agent is added to the resin composition in advance and cross-linking is performed after molding, or an electron beam cross-linking method using electron beam irradiation can be used. When performing chemical crosslinking, an organic peroxide is suitably used as a crosslinking agent.

Specifically, dicumyl peroxide, di-tert-butyl peroxide, 2,5-dimethyl-2,5-di- (tert-butylporoxy) hexane 2,5-dimethyl-2,5- Di (tert-butylperoxy) hexyne-3,1,3-bis (tert-butylperoxyisopropyl) benzene, 1,1-bi (t
tert-butylperoxy) -3,3,5-trimethylcyclohexane, n-butyl-4,4-bis (tert
-Butylperoxy) valerate, benzoyl-oxide, p-chlorobenzoyl peroxide, 2,4-
Examples thereof include dichlorobenzoyl peroxide, tert-butylperoxybenzoate, tert-butylperoxyisopropyl carbonate, diacetyl peroxide, lauroyl peroxide, and tert-butylcumyl peroxide.

A well-known rubber crosslinking method can also be used. For example, ethylene-
When an acrylic rubber is used, a small amount of a third component having a carboxyl group as a functional group for crosslinking is copolymerized in advance, and crosslinking can be performed after molding. Alternatively, electron beam crosslinking can be performed without containing the third component.

The degree of crosslinking of the resin molded product thus crosslinked, that is, the gel fraction is 25 to 60%,
Thereby, good mechanical properties can be obtained in the resin molded product.
The gel fraction here is determined according to ASTM D 2765, and indicates the proportion of the insoluble portion of the resin component in the resin molded product after cross-linking. All of the fractions are crosslinked and insoluble.

When the gel fraction is less than 25%, the tensile strength of the crosslinked resin molded product becomes 10 MPa or less, and the residual heat deformation decreases to 50% or less. In addition, the gel fraction is 60
%, The elongation of the crosslinked resin molded product becomes 150% or less. Further, the non-halogen flame-retardant resin composition of the present invention,
It may be foamed in a range where the degree of foaming is less than 10%.

As described above, the flame-retardant resin composition of the present invention comprises:
Since a relatively large amount of a flame retardant such as a metal hydroxide and a zinc compound is added to a base resin containing the above components A to D as constituents, a zinc compound is used in the initial and middle stages of combustion. A char is generated by the thermal decomposition of the compound, and oxygen is shut off to suppress combustion expansion. If a zinc-based antioxidant is added, decomposition of the resin is suppressed by scavenging of radicals. When combustion proceeds, the metal hydroxide is decomposed into an oxide and water vapor to exhibit flame retardancy, and the components A and B of the base resin are thermally decomposed to form an incombustible gas (C
O, CO ₂ ) generates self-extinguishing properties.

Further, since the components B and C constituting the base resin have a high affinity for additives such as a flame retardant, the mechanical properties are high despite the relatively large amount of the flame retardant added. Degradation is suppressed, and excellent wear resistance can be achieved. In particular, the component C has a large bonding force with the inorganic filler, and the metal hydroxide surface-treated with the silane coupling agent has a large bonding force with the resin. Further, component B has good heat resistance and oil resistance, and has the property of being hardly deformed by heating, component D has excellent mechanical strength, and component C and component D have a function of improving the compatibility of the resin. By using these as the base resin, a resin composition having excellent wear resistance, heat resistance, and mechanical strength can be obtained.

Therefore, A to D constituting the base resin
By the synergistic effect of each of the components and the flame retardant, high flame retardancy can be achieved, and a halogen-free flame retardant resin composition having good abrasion resistance, heat resistance and mechanical properties can be obtained. Further, after molding the non-halogen flame-retardant resin composition of the present invention, the molded article of the present invention, which is crosslinked, improves the bonding strength between the resins by crosslinking, so that the abrasion resistance and heat resistance are further improved. . Thus, according to the present invention, PVC
The same flame retardancy as self-extinguishing can be achieved, it is difficult to burn in case of fire, the amount of smoke is small, and the flame-retardant resin composition and molded product with excellent abrasion resistance, heat resistance and mechanical properties are obtained. can get. Further, since it does not contain halogen and does not generate toxic gas such as halogen gas at the time of combustion, it can be incinerated, and does not generate toxic gas at the time of fire. In addition, since there is no elution of lead, landfill disposal is possible.

The non-halogen flame-retardant resin composition and the molded article of the present invention can be used, for example, insulated wires, wires for electronic equipment wiring,
Various wires and cables such as automotive wires, equipment wires, power cords, insulated wires for outdoor power distribution, power cables, control cables, communication cables, instrumentation cables, signal cables, transfer cables, and ship cables Insulation materials, sheath materials, tapes, and inclusions, and accessories for wires and cables such as cases, plugs, and tapes (specifically, shrink tubing, rubber stress relief cones, etc.), conduits, wiring ducts, In addition to electric products such as bus ducts and the like, they are suitable for agricultural sheets, water supply hoses, gas pipe covering materials, building interior materials, floor materials, and the like.

In particular, the halogen-free flame-retardant resin composition and molded article of the present invention are excellent in abrasion resistance and thus are suitable for electric wires for automobiles. Can be suitably used. Further, a product using EVA as the base resin is suitable for electric wires and power cords, and a product having excellent flexibility, good plug bending characteristics, and excellent tracking resistance of the plug portion can be obtained.

Hereinafter, the effects of the present invention will be clarified by showing specific examples. (Examples 1 to 12, Comparative Examples 1 to 9) Various components were blended in the blending ratios (unit: parts by weight) shown in Tables 1 and 2 below, and kneaded with a kneader to obtain a resin composition. In order to perform a combustion test,
After coating the resin composition after kneading on a conductor having a diameter of 0.5 mm with a thickness of 0.8 mm using an extruder, a linear velocity of 100 m /
An electron beam was crosslinked under the conditions of 5 Mrad to produce an electric wire.

The combustion test was performed using this wire according to the UL standard VW-1 test. The results are shown in the table. In the table, ○ indicates pass, and × indicates rejection. The tensile strength and elongation were measured. The results are shown in the table. The evaluation of the tensile strength was shown as ○ when the pressure was 10 MPa or more, and as X when less than 10 MPa. For elongation, 150% or more
00 to 150% was indicated by Δ, and less than 100% was indicated by X.
Further, the gel fraction was measured. Evaluation of the gel fraction was 25
% To less than 45%, ○: 45% to 60%,
Less than 25% and more than 60% were indicated as x. In order to examine wear resistance, JASO-D611 was used.
A wear resistance test was performed according to the -86 blade reciprocation method.
The results are shown in the table. In the table, ○ indicates pass, and × indicates rejection.

[0046]

[Table 1]

[0047]

[Table 2]

In Tables 1 and 2, each resin and compounding agent are as follows. EVA: Melt flow rate (MFR) = 4, an ethylene-vinyl acetate copolymer having a vinyl acetate content of 28% by weight EVA: Melt flow rate (MFR) = 1, an ethylene-vinyl acetate copolymer having a vinyl acetate content of 46% by weight Polymer Ethylene-acrylic rubber: copolymer of methyl acrylate and ethylene, content of methyl acrylate 50% by weight Ethylene-acrylic rubber: copolymer of methyl acrylate and ethylene, content of methyl acrylate 65% by weight Urethane rubber : Caprolactone type, hardness (JIS A)
= 92 maleic anhydride-modified LLDPE: MFR = 1.0, maleic anhydride-modified amount 1% by weight maleic anhydride-modified SEBS: MFR = 22, hardness (Shore A) = 75, styrene content 28% by weight, maleic anhydride Modification amount 0.5% by weight

Thermoplastic elastomer: hydrogenated styrene-isoprene copolymer (SEPS), styrene content 3
0% by weight magnesium hydroxide: magnesium hydroxide surface-treated with stearic acid magnesium hydroxide: magnesium hydroxide surface-treated with silane coupling agent aluminum hydroxide: aluminum hydroxide surface-treated with stearic acid aluminum hydroxide: silane cup Aluminum hydroxide surface treated with a ring agent Zinc compound: zinc hydroxystannate (decomposition temperature 220
° C) Zinc compound: Zinc sulfide (decomposition temperature 650 ° C) Molybdenum compound: Ammonium molybdate Antioxidant: Phenolic antioxidant Dispersion improver: Alkyl ether / maleic anhydride copolymer Lubricant: Stearic acid Crosslinking assistant: TMPT (Trimethylolpropane trimethacrylate)

[0050]

As described above, according to the present invention, since it has high flame retardancy and does not contain halogen, it can be incinerated and has good abrasion resistance, heat resistance and mechanical properties. And a cross-linked resin molded product are obtained.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C08L 23/08 C08L 23/08 23/26 23/26 33/08 33/08 75/04 75/04 H01B 3/00 H01B 3/00 A 3/28 3/28 3/44 3/44 FMP 7/295 7/34 B (72) Inventor Jun Suzuki 1-5-1, Kiba, Koto-ku, Tokyo Stock Association Inside Fujikura Corporation (72) Inventor Akira Yoshino 1-5-1, Kiba, Koto-ku, Tokyo F-term in Fujikura Corporation (reference) 4F071 AA15X AA28X AA32X AA33 AA33X AA53 AB18 AB20 AE07 BC05 BC06 4J002 BB06X BB07X BB08XBB08BB BG04W BN053 CK02W DE076 DE146 DE187 EG047 EV137 EV347 FB096 FD136 GQ00 GQ01 5G303 AA08 AB20 BA12 CA09 CA11 5G305 AA02 AA14 AB15 AB25 AB35 CA01 CA04 CA07 CA18 CA47 CA51 CC03 CD13 5G315 CA03 CB02 CD08 CD01 CD02

Claims (7)

[Claims] 1. A component 30 to 65 parts by weight selected from the group consisting of a polyolefin-based resin containing an oxygen atom in a polymer, and a component B 15 selected from the group consisting of acrylic rubber, ethylene-acrylic rubber, and urethane rubber. ~ 7
0 parts by weight and 0 to 15 parts by weight of a C component selected from the group consisting of an acid-modified polyolefin-based resin, and 100 parts by weight of a base resin obtained by mixing such that the total of each component becomes 100 parts by weight. And 50 to 300 parts by weight of a metal hydroxide and 1 to 50 parts by weight of a zinc compound. 2. The composition according to claim 1, wherein the component A is an ethylene-vinyl acetate copolymer, an ethylene-ethyl acrylate copolymer, an ethylene-butyl acrylate copolymer, or an ethylene-vinyl acrylate copolymer.
1 selected from the group consisting of methyl acrylate copolymer
2. The non-halogen flame-retardant resin composition according to claim 1, wherein the composition is a kind or two or more kinds. 3. The method according to claim 1, wherein a part or all of the metal hydroxide is
The non-halogen flame-retardant resin composition according to claim 1, which is a metal hydroxide surface-treated with a silane coupling agent. 4. An electric wire / cable or peripheral parts thereof, comprising the non-halogen flame-retardant resin composition according to claim 1. 5. An electric wire for a device or an electric wire for an automobile, comprising the non-halogen flame-retardant resin composition according to any one of claims 1 to 3. 6. A non-halogen, flame-retardant resin molded product obtained by molding the non-halogen, flame-retardant resin composition according to claim 1. 7. The non-halogen flame-retardant resin molded product according to claim 6, wherein the gel fraction is 25 to 60%.